我在使用cypress的68013的开发板。上位机使用官网提供的基于C#的类库，正在学习相关的例子程序。可是一开始就碰到了棘手的问题，请看下面的代码
public partial class Form1 : Form
{
App_PnP_Callback evHandler;
CyUSBDevice loopDevice = null;
USBDeviceList usbDevices = null;
CyBulkEndPoint inEndpoint = null;
CyBulkEndPoint outEndpoint = null;
Thread tXfers;
bool bRunning = false;
int value;
long outCount, inCount;
const int XFERSIZE = 256;
byte[] outData = new byte[XFERSIZE];
byte[] inData = new byte[XFERSIZE];
// These 2 needed for TransfersThread to update the UI
delegate void UpdateUICallback();
UpdateUICallback updateUI;
public Form1()
{
InitializeComponent();
// Setup the callback routine for updating the UI
updateUI = new UpdateUICallback(StatusUpdate);
// Setup PnP event handling
evHandler = new App_PnP_Callback(PnP_Event_Handler);
// Create a list of CYUSB devices
usbDevices = new USBDeviceList(CyConst.DEVICES_CYUSB, evHandler);
setDevice();
}
public void setDevice()
{
if (usbDevices.Count > 0)
loopDevice = usbDevices[0x0547, 0x0080] as CyUSBDevice;
StartBtn.Enabled = (loopDevice != null);
if (loopDevice != null)
Text = loopDevice.FriendlyName;
else
Text = "Bulkloop - no device";
// Set the in and out endpoints per the selected radio buttons.
EptPair1Btn_Click(this, null);
}
…………
执行
usbDevices = new USBDeviceList(CyConst.DEVICES_CYUSB, evHandler);
始终不成功 |
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